Figure 4

(a) Change of the exponential decay rate \(\gamma _1\) along the node-spiral separation line. Parameters corresponds to Subject 9. (b,c) Dependence of \(\gamma _1\) as function of p and d along the node-spiral separation line. \(\pm 10\)% perturbation of the gains \((p^*,d^*)\) and \((\hat{p}, \hat{d})\) and the resulted change in \(\gamma _1\) is shown by grey and green shading, respectively.